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| author |   Mike Snitzer <snitzer@redhat.com> | 2010-12-17 08:34:20 +0100 |
|---|---|---|
| committer |   Jens Axboe <jaxboe@fusionio.com> | 2010-12-17 08:36:01 +0100 |
| commit | 72d4cd9f38b5ed96b75df4c622be25e1c2648dd3 (patch) | |
| tree | a229645cbbc63aad3fa5b57ea9f092e618588890 /include/linux/blkdev.h | |
| parent | block: Deprecate QUEUE_FLAG_CLUSTER and use queue_limits instead (diff) | |
| download | linux-dev-72d4cd9f38b5ed96b75df4c622be25e1c2648dd3.tar.xz linux-dev-72d4cd9f38b5ed96b75df4c622be25e1c2648dd3.zip | |
block: max hardware sectors limit wrapper
Implement blk_limits_max_hw_sectors() and make
blk_queue_max_hw_sectors() a wrapper around it.
DM needs this to avoid setting queue_limits' max_hw_sectors and
max_sectors directly. dm_set_device_limits() now leverages
blk_limits_max_hw_sectors() logic to establish the appropriate
max_hw_sectors minimum (PAGE_SIZE). Fixes issue where DM was
incorrectly setting max_sectors rather than max_hw_sectors (which
caused dm_merge_bvec()'s max_hw_sectors check to be ineffective).
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@kernel.org
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 95aeeeb49e8b..36ab42c9bb99 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -808,6 +808,7 @@ extern struct request_queue *blk_init_allocated_queue(struct request_queue *, extern void blk_cleanup_queue(struct request_queue *); extern void blk_queue_make_request(struct request_queue *, make_request_fn *); extern void blk_queue_bounce_limit(struct request_queue *, u64); +extern void blk_limits_max_hw_sectors(struct queue_limits *, unsigned int); extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int); extern void blk_queue_max_segments(struct request_queue *, unsigned short); extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); |